Centrifuge rotor



FIG. 1 is a top perspective view of a centrifuge rotor showing my new design;

FIG. 2 is a top plan view thereof; and,

FIG. 3 is an enlarged cross-sectional view taken along line 3-3 of FIG. 2.

The elements shown in broken dashed lines in FIGS. 1-3 depict portions of the centrifuge rotor that form no part of the claimed design. 

CLAIM The ornamental design for a centrifuge rotor, as shown and described. 